forked from mirrors/linux
d4983983d9
Amlogic SoCs have a repository of 256 canvas which they use to describe pixel buffers. They contain metadata like width, height, block mode, endianness [..] Many IPs within those SoCs like vdec/vpu rely on those canvas to read/write pixels. Reviewed-by: Jerome Brunet <jbrunet@baylibre.com> Tested-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Maxime Jourdan <mjourdan@baylibre.com> Signed-off-by: Kevin Hilman <khilman@baylibre.com>
65 lines
1.9 KiB
C
65 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (C) 2018 BayLibre, SAS
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*/
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#ifndef __SOC_MESON_CANVAS_H
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#define __SOC_MESON_CANVAS_H
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#include <linux/kernel.h>
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#define MESON_CANVAS_WRAP_NONE 0x00
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#define MESON_CANVAS_WRAP_X 0x01
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#define MESON_CANVAS_WRAP_Y 0x02
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#define MESON_CANVAS_BLKMODE_LINEAR 0x00
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#define MESON_CANVAS_BLKMODE_32x32 0x01
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#define MESON_CANVAS_BLKMODE_64x64 0x02
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#define MESON_CANVAS_ENDIAN_SWAP16 0x1
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#define MESON_CANVAS_ENDIAN_SWAP32 0x3
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#define MESON_CANVAS_ENDIAN_SWAP64 0x7
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#define MESON_CANVAS_ENDIAN_SWAP128 0xf
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struct meson_canvas;
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/**
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* meson_canvas_get() - get a canvas provider instance
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*
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* @dev: consumer device pointer
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*/
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struct meson_canvas *meson_canvas_get(struct device *dev);
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/**
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* meson_canvas_alloc() - take ownership of a canvas
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*
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* @canvas: canvas provider instance retrieved from meson_canvas_get()
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* @canvas_index: will be filled with the canvas ID
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*/
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int meson_canvas_alloc(struct meson_canvas *canvas, u8 *canvas_index);
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/**
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* meson_canvas_free() - remove ownership from a canvas
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*
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* @canvas: canvas provider instance retrieved from meson_canvas_get()
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* @canvas_index: canvas ID that was obtained via meson_canvas_alloc()
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*/
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int meson_canvas_free(struct meson_canvas *canvas, u8 canvas_index);
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/**
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* meson_canvas_config() - configure a canvas
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*
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* @canvas: canvas provider instance retrieved from meson_canvas_get()
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* @canvas_index: canvas ID that was obtained via meson_canvas_alloc()
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* @addr: physical address to the pixel buffer
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* @stride: width of the buffer
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* @height: height of the buffer
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* @wrap: undocumented
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* @blkmode: block mode (linear, 32x32, 64x64)
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* @endian: byte swapping (swap16, swap32, swap64, swap128)
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*/
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int meson_canvas_config(struct meson_canvas *canvas, u8 canvas_index,
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u32 addr, u32 stride, u32 height,
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unsigned int wrap, unsigned int blkmode,
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unsigned int endian);
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#endif
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